html,
body {
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 100%;
}
body{
    background-color: green;
}
html{
    background-color: aqua;
    overflow: hidden;
    border: 1px solid rgb(76, 0, 255); /* 设置边框宽度和颜色 */
    box-sizing: border-box; /* 包含边框和内边距 */
}

#waveformCanvas {
    width: calc(100% - 35px);
    height: calc(100% - 25px);
    padding: 0px;
    /*上右下左 */
    margin: 5px 5px 20px 30px;
    background-color: rebeccapurple;
    border: 1px solid gold; /* 设置边框宽度和颜色 */
    box-sizing: border-box; /* 包含边框和内边距 */
}